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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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package java.security.spec;

/**

 * This immutable class specifies an elliptic curve public key with

 * its associated parameters.

 *

 * @see KeySpec

 * @see ECPoint

 * @see ECParameterSpec

 *

 * @author Valerie Peng

 *

 * @since 1.5

 */

public class ECPublicKeySpec implements KeySpec {

    private ECPoint w;

    private ECParameterSpec params;

    /**

     * Creates a new ECPublicKeySpec with the specified

     * parameter values.

     * @param w the public point.

     * @param params the associated elliptic curve domain

     * parameters.

     * @throws    NullPointerException if {@code w}

     * or {@code params} is null.

     * @throws    IllegalArgumentException if {@code w}

     * is point at infinity, i.e. ECPoint.POINT_INFINITY

     */

    public ECPublicKeySpec(ECPoint w, ECParameterSpec params) {

        if (w == null) {

            throw new NullPointerException("w is null");

        }

        if (params == null) {

            throw new NullPointerException("params is null");

        }

        if (w == ECPoint.POINT_INFINITY) {

            throw new IllegalArgumentException("w is ECPoint.POINT_INFINITY");

        }

        this.w = w;

        this.params = params;

    }

    /**

     * Returns the public point W.

     * @return the public point W.

     */

    public ECPoint getW() {

        return w;

    }

    /**

     * Returns the associated elliptic curve domain

     * parameters.

     * @return the EC domain parameters.

     */

    public ECParameterSpec getParams() {

        return params;

    }

}